Fastening device



FIG. 1 is a perspective view of the fastening device showing my new design;

FIG. 2 is a top view of the fastening device of FIG. 1, the bottom view being the same as the top view; and,

FIG. 3 is a left side view of the fastening device of FIG. 1, the right side view being the same as the left side view.

The filament is shown broken-away to depict indeterminate length. 

The ornamental design for a fastening device, as shown and described. 